i wouldnt say brute force are comparable to spicers at all.... oem parts>parts store parts always. Spicers 760x joint is cold forged and is the strongest joint besides CTMS. Any other parts store joint is heat forged, 760s are cold forged, tripple sealed and have the largest cross available. A stronger cross trunion means the trunion ends inside the caps are less likely to wear from the roller bearings, creating tighter gaps which means less debris/water/dirt ect will be able to get into the roller bearings. Any joint with a cheap seal and worn out roller bearings will eventually allows water to go in and destroy a joint. Idk about you man but dana/spicer will always be of better quality then some parts store quality parts. You get what you pay for when it comes to u joints, im sure these brute force joints will do the job for someone just street driving but if you do any off pavement driving id say why not go with the best quality joint you can get? 760s are like under 28$ a piece anyway.
My original axle shaft u joints lasted just under 100k miles.
My front axle drive shaft u joints have 120k on them and are still tight.
My rear driveshaft was from an xj with 250k miles on it (im sure they where replaced at some point), i installed this shaft when doing my sye and didnt replace any of the joints, those originals lasted another 30k miles after i got it. I'm finally replacing the last u joint on that driveshaft in the next few days.
These u joints were driven on snowy salt covered roads for many winters, and wheeled hard on the rocks and obviously through some muddy water out on the trails and they still lasted that many miles. If these joints can handle the stresses of wheeling locked on 33s on blue/black trails im sure anyone just driving around down will be fine. If the joints are greasable you have to keep up on the maintanence with them to get the most out of them.
I'd say the original spicers lasted a pretty damn long time, go for u joints that you know will last you another 100+k miles.